Research on Fatigue Performance and Design Optimization of Anchorage Zone of Long-span Cable-stayed Bridge
Anchor box connection is widely used in long-span cable-stayed bridges.At present,the fatigue mechanism of the anchorage structure and the influence of parameter changes on the mechanical performance are not clear.It is difficult to explore the actual working state of the structure by conventional mechanical analysis.In order to explore the stress law of anchor box structure of cable-stayed bridge,a finite element analysis model is established based on Hengmenxi Bridge of Nansha-Zhongshan Expressway.The fatigue performance and parameter analysis of steel anchor beam and steel anchor box on the tower are carried out.The results show that the steel anchor beam and steel anchor box structure on the tower have no fatigue damage under the condition of large cable force.Adjusting structural parameters can significantly improve the structural stress concentration problem.Through parameter analysis,the optimization suggestions of cable-girder anchorage structure design are put forward,which can improve the mechanical performance of anchorage structure.
bridge engineeringcable-stayed bridgesteel anchor beam on the towersteel anchor boxparameter analysis
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